code: def unset_data_dir():
      pyproj.datadir._USER_PROJ_DATA = None
      pyproj.datadir._VALIDATED_PROJ_DATA = None
  
file_path: pyproj/test/conftest.py
imports: import os
  import pickle
  from contextlib import contextmanager
  from pathlib import Path
  import numpy
  import pytest
  from packaging import version
  import pyproj
  from pyproj.datadir import get_data_dir, get_user_data_dir, set_data_dir
label_desc: Use image node_id 1 for calling a global function with example usage: unset_data_dir() without return types